Operation Manual

Simrad AP20 Autopilot
48 20220505H
3.12 NMEA messages
NMEA messages and data overview for IS15, AP11, AP20, AP35, AP300X, AP3000(X) and J3xx V1R8
Message ident.
HDG
(HDM)
HDT
RSA
MWV
(VWR)
(DBK)
DBT DPT
MTW
VHW
VLW
GGA
GLL
RMA
RMC
VTG
ZDA
(APA)
APB
BOD
Data source:
(n/p/h=nav/pos/heading source, c=calculated)
: h h h c ppppp nnn
Accept. cond
. (N=no nav. flg warning, P= no pos. flg warning)
: PPPPP NNN
Status flag P* P P P N N
Compass_Data Compass heading, M 2 1 X
Compass heading, T 2 3
Rudder_Data
Rudder angle 1
Wind_Data Apparent wind angle 2 1
Apparent wind speed 2
1
Depth_Data Depth ref transducer 132
Transducer-Keel Offset X*
Depth range X
Speed_Temp_Data Speed through water 1
Log distance and trip 1
Water temperature 1
Gps_Data Present position Lat, Long 4123
COG, T 123
COG, M 1
Universal Time Coordinated (UTC)
3
1
2
4
Magnetic variation
x45
SOG 123
Nav_Data
To-wp position
To-wp ident.
675
From-wp ident. 3
Bearing wp-wp, T 65
Bearing wp-wp, M 564
Bearing pos-wp, T 4
Bearing pos-wp, M
3
Distance pos-wp
Time to go to dest. Wp
XTE 45
Waypoint closure velocity, VMG
Steering_contr1 Heading steering cmd, T / M
Light_Cmd
IS11 illumination
IS15 RX: x x x x xxxxxxx xxxxxxxxx
IS15 TX: x x x xxxx xx x
J3xx RX:
x x x xxxxxxxxxxxxxxxxx
J3xx TX:
Transmission interval in sec.-> 1 1 1 1 2 2 2
J3xx TX:
If Instr. port (ref instr setup)-> .2 1 .2 .2
J3xx V1R7 onwards Channel2 TX:
.1* 1 .1* 1
Note ! 1. APB message may read in true or magnetic bearing wp-wp
and bearing pos-wp. These fields are sent as magnetic bearings
from IS15.
2. IS15. Magnetic variation from the HDG message is only used
to calculate true heading from the data in the same Hdg
message, and is not read in to the system.